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Author Topic: Zyxel VMG3925-B10C Cellular Backup option  (Read 1494 times)

machare

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Zyxel VMG3925-B10C Cellular Backup option
« on: November 14, 2022, 09:21:14 PM »

I have a Zyxel VMG3925-B10C which has a Cellular Backup option that uses  a Cellular (Mobile phone signal) USB dongle.

Has anyone managed to get this to work? Is the router likely to be fussy about the dongle or do they use a standard interface.

I would like to get this working as my VDSL service has failed due to a damaged phone line which will probably take some weeks to replace.

I have ordered a 4g dongle on ebay but it is much more complex that the last one I had as it comes with wifi and a built in router. I want the dongle to connect to my Zyxel router as then my wired internet devices will then work.

[Moderator edited to change from VMG8925 to VMG3925 within this post and also in the topic subject line.]
« Last Edit: November 15, 2022, 05:49:03 PM by burakkucat »
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tubaman

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Re: Zyxel VMG3925-B10C Cellular Backup option
« Reply #1 on: November 15, 2022, 08:40:09 AM »

I'm a bit confused about which router you actually have - there's a VMG3925-B10C which has a 3g USB dongle capability.
If the eBay one you've bought is this type - https://www.ebay.co.uk/itm/374335351856 - then I think they only use the USB connection for power and use a wi-fi connection for clients, whereas your router will be wanting to use the USB for data and power. 
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BT FTTC 55/10 Huawei Cab - Zyxel VMG8924-B10A

machare

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Re: Zyxel VMG3925-B10C Cellular Backup option
« Reply #2 on: November 15, 2022, 10:02:15 AM »

Thanks for your reply.

Yes you are right it should say VMG3925-B10C.

I have since found that there is https://www.ebay.co.uk/itm/374212347139 which is possibly what I need. Unfortunately I was not aware that there are two types of 4g USB modem dongles. :(

I really want remote access which is difficult with a mobile signal as I think only three will let you have a public IP address.

A neighbour had a fence put up and one of the posts damaged the underground phone cable. Openreach did not want to repair it because of the concrete, and so are to install a new underground line. The bad news is that I rather think the line to the cabinet will be longer. The good news is that it will make installing FTTP easier whenever that comes.
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tubaman

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Re: Zyxel VMG3925-B10C Cellular Backup option
« Reply #3 on: November 15, 2022, 11:22:16 AM »

Thanks for your reply.

Yes you are right it should say VMG3925-B10C.

I have since found that there is https://www.ebay.co.uk/itm/374212347139 which is possibly what I need. Unfortunately I was not aware that there are two types of 4g USB modem dongles. :(

...

That might work, but whether your Zyxel will be able to talk to the USB part you won't know until you try and configure it. Personally I think you'd be better off with a standalone 4g modem that can be connected to the Zyxel's WAN port, but I think they are somewhat more expensive than the USB versions.
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BT FTTC 55/10 Huawei Cab - Zyxel VMG8924-B10A

meritez

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Re: Zyxel VMG3925-B10C Cellular Backup option
« Reply #4 on: November 15, 2022, 11:45:37 AM »

You may be better off with a ZTE MF286D, put it in bridge mode and connect it to the WAN ethernet port of the Zyxel.
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machare

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Re: Zyxel VMG3925-B10C Cellular Backup option
« Reply #5 on: November 19, 2022, 10:14:18 PM »

Thank you for all the replies.  When I connected the 4g USB dongle to a USB charger I could access the internet via its wifi.

If I plugged the dongle into a Windows 10 laptop, a Windows Network Connection was created using a Microsoft NDIS driver.

Alas, I never managed to get the dongle to supply an Internet connection to the Zyxel router.

Fortunately Openreach have provided me with a new copper telephone line and my Zyxel router has connected to the VDSL signal.   
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